Materials Literature
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Reactions of µ-ethynediyldiplatinum complexes with tetracyanoethylene in refluxing benzene result in the formation of s-cis and s-trans-µ-butadiene-2,3-diyldiplatinum complexes, of which structures are established by X-ray crystallographic analysis.
Porous material of the CuX zeolite type has been synthesized and used as support for a classic antitumoral drug--cyclophosphamide (CP). The new material obtained represents a physical mixture of the two components. In vivo tests allowed biochemical and anatomopathological evaluation of antitumoral effects determined b…
After the development of the oscillating disk curemeter over 30 years ago, standard conditions for measuring scorch times (time till the onset of vulcanization) were developed. ISO 3417 and ASTM D2084 describe ts1 and ts2 test parameters which are accepted by the rubber industry as a method for measuring scorch times.…
The aim of this presentation is to review some of our recent work mostly on poly(amidoamine)s (PAAs) and some other families of polymers structurally related to PAAs of medical interest. PAAs are obtained by stepwise polyaddition of primary monoamines, or bis secondary amines, to bisacrylamides. There are several othe…
Undercooling of liquids is a common occurrence in solidification. The level of undercooling influences both the microstructural development by controlling phase selection during nucleation and the morphological evolution during the growth phase of solidification. The development of large liquid undercooling is linked…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of Rhodium Porphyrins with Lactones, Silanes, and StannanesTadashi Mizutani, Tetsuya Uesaka, and Hisanobu OgoshiCite this: Organometallics 1995, 14, 1, 341–346Publication Date (Print):January 1, 1995Publication History Published online1 May 2002Published inissue 1…
In order to investigate the relationship between the impact and static bending behaviors at low temperatures for molybdenum having different grain structures and different grain boundary strengths, the impact and static bend tests were performed for miniaturized specimens of five kinds of molybdenum. The pure molybden…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotodecomposition and Regeneration of PbI2 Nanometer-Sized Particles, Embedded in Porous Silica FilmsE. Lifshitz, M. Yassen, L. Bykov, I. Dag, and R. ChaimCite this: J. Phys. Chem. 1995, 99, 4, 1245–1250Publication Date (Print):January 1, 1995Publication History Published o…
o-phenylenediamine (o-PD) was electropolymerized on glassy carbon electrodes under a potential cycling condition. \nThe resulting polymer films mediated electrons for the reduction of molecular oxygen at pH=1.0. It was found from \nthe RDE, RRDE, and cyclic voltammetry experiments that the modified electrode…
We have discussed the rule by which the predominant cold deformation modes of metastable β phase are governed depending on their chemical compositions through the examinations of the effects of Sn, Al, and Zr on β-quenched and slightly cold rolled microstructures in a Ti-V based alloy system. It seems in Ti-V binary a…
Ewald's method of accelerated convergence [Ewald (1921). Ann. Phys. (Leipzig), 64, 253–287] is generalized to calculate the electrostatic potential of a crystal in which the atoms have overlapping spherical densities. The algorithm is applied to the cubic NaF crystal. The potentials at the Na and F nuclei are calculat…
We have applied the spin dynamics technique to conducting polymers, in particular, with the ESR method, and investigated microscopic transport properties in a quasi-one-dimensional (Q1D) polymer chain. This technique is a unique method for obtaining microscopic information on intrinsic transport properties, because ma…
Stochastic models have been developed for the simulation of grain structure formation during the solidification of metallic alloys. Nucleation is assumed to occur randomly in space according to a prescribed distribution of nucleation sites. For dendritic alloys, the hypothesis of a random orientation of the ‹100› crys…
Sexual reproduction and protoplast structure are used to check the classification of the naviculoid genus Placoneis Mereschkowsky (Bacillariophyta). The gametangia are closely associated within a robust mucilage capsule throughout auxosporulation, and pairing is ± random with respect to asymmetries of the frustule and…
Lateral substitution in the peripheral phenyl groups of the triphenylen-2,3,6,7,10,11-hexayl hexakis(4-alkoxybenzoate)s was investigated via substitution of methyl, ethyl, isopropyl and tert-butyl groups ortho to either the peripheral alkoxy chain or the internal ester linking group. The discotic mesogenic compounds w…
A novel self-doped polymer having aikylphosphonic acid moieties on polyaniline is synthesized from persulfate oxidative coupling of O-aminobenzylphosphonic acid 3; the resulting polymer, apart from being water soluble in its self-doped monosodium salt form, demonstrates excellent redox stability when subjected to pote…
The 76 displacement cascades in Ni3Al at 100 K simulated in part I have been analysed to investigate the influence of the energy E p of the primary knock-on atom on the kinetics of defect production, the degree of disorder and the atomic mixing of the different atomic species. The Ni atoms are more readily displaced d…
SUMMARYThe corrosion behaviour of a wide range of zinc and zinc alloy coated steels, in wood preservative solutions and timber environments, has been investigated using electrochemical measurements. For rapid evaluation of corrosion performance, the corrosion tests were carried out on specimens immersed in copper/chro…
Angular dependent magnetic Barkhausen noise (MBN) measurements were performed on three pipeline steel samples under uniaxial tensile stress up to 260 MPa. An expression for the angular dependent strain given by /spl delta/L/L/spl ap//spl Delta/L/L(1+/spl nu/)sin/sup 2//spl theta/, where /spl theta/ is the angle of the…
The properties and catalytic behaviour of adsorbed oxygen species on alumina-supported cerium oxides (CeO2, CeAlO3 and CeO2 –x) for methane oxidation have been investigated by means of EPR, FTIR, temperature-programmed desorption (TPD) and 18O tracer techniques. The adsorbed oxygen on the cerium oxide catalysts was fo…